I can't tell

Cassie

I'm having these constant cramping type pains on the lower left side of my back, it's not stopping and I can feel intervals....but can't tell exactly if I should go to get checked over or wait a while and see, so far I have stood, laid down, and sat and nothing is helping it, baby is moving currently aswel and I for sure don't wanna waste 4 hours down there waiting for nothing, 31 weeks 1 day also.